Button vs. Badge vs. Pin

On Tue, 15 Oct 1996, Simon Brown wrote:

> > > What's a button?
> > It's a 2.25 inch piece of circular metal, with a pin on the back and
> > a picture on the front.  
> Surely this is a badge....

	True, I think the term badge makes more sense, but to confuse
things, here, that is what a police officer carries to prove they can lock
you up.  In France/Belgium, a 'pin' is called 'un pins' (even if it is 
singular), call it 'un pin' and they'll laugh.  Bonus points to the 
person who can say why. . .